portable

### Defining Environmental Parameters

Temperature, pressure, and humidity affect the measurement values that your Leica tracker acquires. Compensation is provided for measurements based on the changes in these values, which calculate the refraction index of IFM / ADM.

You can use a Meteo Station to provide these values, or you can manually enter these values if you do not have a Meteo Station. When the Meteo station is enabled, the refraction is calculated every 30 seconds. For changes that are greater than 5 ppm, the parameters are updated accordingly.

To manually alter these values, do one of the following:

- From the Machine Options dialog box (Edit | Preferences | Machine Interface Setup), edit the Leica environmental parameters. If you have a Meteo station but would like to manually edit the values, deselect the Use Temperature Station option.

- From the Leica status bar (View | Status Bar | Tracker), edit the environmental values by clicking on the value and typing the new value.